Floor-surfacing machine.



G. H. WERNER. FLOOR SURFAGING MACHINE.

AfPI-ICATION FILED APR.29, 1914 v 1 11 29 mg, Patented 2, 1915.

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0. H. WERNER.

FLOOR SURFAOING MACHINE. APPLICATION FILED APR. 29, 1914.

MRQQMQQ, Patented Mar. 2, 1915.

Z SHEETS-SHEET 2.

j form z n CARL H. WERNER, or warnaroo, IOWA.

FLOOR-SUBFACING MACHINE.

Specification of Letters Patent.

Patented Mar. 2, i915.

Application filed April 29, 1914. SeriaLNo. 835,163.

I To all 10750771, it may concern Be it known that I, CARL H. WERNER, a citizen of the United States of America, and a resident of Waterloo, Blackhawk county, Iowa, have invented certain new and useful Improvements in Floor-Surfacing Machines, of which the following is a specification.

This invention relates to improvements in machines for surfacing floors, and the object of my improvement is to furnish a device of this kind which will satisfactorily smooth down the surface of a floor and which has its abrading mechanisms so arranged in order that they will act positively in the process and be supplied with means for detachably securing abrading strips thereon for convenient replacement when desired. This' object I have accomplished iby the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of my improved machine for surfacing floors, showing parts broken away. Fig. 2 is a horizontal section of the device shown in Fig. 1, taken along the line AB thereof. Fig. 3 is an end elevation of said machine, showing the parts broken away. Fig. 4 is a side elevationof one of the abrading mechanisms, showing parts thereof vertically sectioned.

Similar numerals of reference denote cor responding parts throughout the several views.

My improved machine for surfacing floors comprises a supporting frame which is built up from the spaced longitudinal side bars 19, having uprights 16 fixed to their opposite ends, and the upper ends of the latter are fixed-l-y connected together by means of the spaced transverse bars 17 and 18. The latter bars have their interspaces partially filled by means of the blocks 32, the ends of the latter being spaced apart to provide horizontal longitudinally extended interspaces or slideways 31. The lower bar 18 is reinforced at its ends by means of angle plates 33 securing it to the side uprights 16. The uprights 16 are further supported by means of braces 20 extendingfrom the a upper ends thereof to the side bars 19. Arch-bars 30 are placed longitudinally and secured at their ends to the upper parts of the transverse bars 17. Handles29 are secured to said arch-bars, and the. motor is mounted upon one of them. Upwardly projecting plates 23 are secured to the middle parts of the side bars 19, and have bearings 24 secured upon their upper ends to receive the ends of a rotatable crank shaft 1, which is supplied with a plurality of oppositely projecting cranks 2-. A sprocket wheel 22 is secured upon one end of the shaft 1, and

.is driven by means of a sprocket chain 25 passed about a small pinion 27 secured on the driving shaft 26 of said motor 28. To each of said cranks 2 is pivoted a pitman 3, and to each pitman is pivoted one end of the slide-bar 4, which latter is passed slidably through one of the slideways 31. Each slide-bar 4-has its outwardly projected end bent downwardly and provided with pintles which are pivoted in lugs 5 located near one end of the top of the block 6.

Referring now to Fig. 4, it will be seen that another block 7 is located under the block (3 to fit thereon, and that the opposite ends of said blocks are angularly grooved transversely along the line of their junction. In these grooves are seated detachable fitting strips 14 and 15, and a rectangular clamp 9' is then placed about both blocks, covering their said line of ji mction and also the said strips as shown. One end of the said clamp is pivotally secured to the abutting end of the upper block 6 by means of the hinge 10 so, that the upper block may be swung free from said clamp upwardly when desired. The strip. 14 is fixedly secured to said clamp, while the other strip 15 is detachable from the clamp at that end. A thumb screw 11 is seated within athreaded orifice in the clamp 9 to bear against the strip 15. A strip of sand paper or other abrasive material 8 is then passed about the flat underface of the lower block 7 longitudinally, then passed upwardly over both ends of both the blocks 6 and. 7 to be seated between them and the strips 14 and 15 within the said angular troughs or grooves. The thumb screw 11 is then moved to tighten the said strips firmly against the ends of the abrasive strip to hold it securely in place.

The numeral 12 denotes oppositely di rected studs or pins on the down-turned end of each slide-bar 4, and springs 13 have their ends secured about said studs. The springs are preferably of looped form, having their looped ends seated upon the upper surface of the block 6 to exert a yielding pressure thereon, and thereby tend to hold the block 7 level upon the floor to be surfaced with a yielding pressure, similar to a manual pressure. When it is necessary to remove the abrasive strip 8, the blocks can be tilted upwardly on the pivots 5 against the. yielding spring 13, the thumb, screw 11 then loosened, and the upper block 6 swung upwardly, while the lower block 7 isdrawn downwardly, thereby releasing said strip 8.

The blocks are. then're-coveredwith another abrasive strip, whose ends are easily introduced into the troughs or grooves in said blocks, and secured therein by means of the thumb screw 11 and the strips 14 and 15. The machine is operated by. pushing it by means of the handles 29 on the floor to be surfaced while the motor 28 is rotating the crank shaft 1 to reciprocate the said abrasive mechanisms by the operative con- 'nections shown. The abrading mechanisms are located at opposite ends of the device, and are staggered in relation to each other which permits them to work upon a surface where parts thereof are of slightly different levels and yet be able to impart a any desired claimas new, and desire to secure by Letters Patent, 1s: V

1. In a floor surfacing machine, the combination with a supporting frame having horizontal supporting slideways on opposite ends thereof, a rotary shaft mounted .across said frame medially, and provided upon the outer downturned ends of said I arms.

2. In a floor surfacing machine, the combination with a supporting frame having horizontal supporting slideways on opposite ends thereof, a rotary shaft mounted across said frame, and provided with a plurality of oppositely-projecting cranks, pitmen connected to said cranks, downwardly curved arms pivoted to said pitmen and slidably seated upon said slideways, abrading mechanisms nivotally connected to the outer downturned ends of said arms, and yieldable resilient means connected to said arms and adapted to yieldingly bear against said mechanisms to keep them in contact throughout with the surface operated upon. Signed at Waterloo, Iowa, this 15th day of April, 1914:.

CARL H. WERNER. Witnesses:

W. H. BRUNiv, GEO. G. KENNEDY. 

